Va. Reznikov et Lb. Volodarsky, REACTION OF ALPHA-HYDROXYAMINO KETONES WITH DICARBONYL-COMPOUNDS - SYNTHESIS OF IMIDAZOLINE NITROXIDES WITH A FUNCTIONAL-GROUP IN A SIDE-CHAIN, Liebigs Annalen, (5), 1997, pp. 1035-1040
The reaction of alpha-hydroxyamino ketones 1 with diacetyl, acetyl ace
tone or acetoacetic ester in the presence of ammonium acetate results
in the formation of 3-imidazoline derivatives 2, which are precursors
for the synthesis of stable nitroxides 8, 9, 14, 16, 17, 23-24 with va
rious functional groups in the side chain at the 2-position of the het
erocycle.